{"id":"71864e5d-fdfc-43aa-abfd-f13d12f633aa","title":"青藏高原地区0.25°×0.25°地表土壤水分数据（SMsmapTE, V1）","title_en":"Land Surface Soil Moisture Dataset of SMAP Time-Expanded Daily 0.25°×0.25° over Qinghai-Tibet Plateau Area (SMsmapTE, V1)","serial":"","user_limit":"为尊重知识产权、保障数据作者的权益、扩展数据中心的服务、评估数据的应用潜力，请数据使用者在使用数据所产生的研究成果中（包括公开发表的论文、论著、数据产品和未公开发表的研究报告、数据产品等成果），明确注明数据来源和数据作者。对于转载（二次或多次发布）的数据，作者还须注明原始数据来源。","instructions":"文件命名约定：YYYYMMDD.tiff\t（YYYY：年，MM：月，DD：日）\n数据版本号：V1\n投影：+proj=longlat +datum=WGS84 +no_defs\n数据格式：GeoTIFF, 80行×160列\n土壤水分单位：cm3/cm3\n土壤水分有效值范围：0.02~0.5\n填充值：NaN","description":"本数据集为基于SMAP时间扩展方法生产的青藏高原地区0.25°×0.25°地表土壤水分产品。即采用随机森林方法，利用被动微波亮温数据及相关辅助数据，实现对SMAP L3级地表土壤水分产品的时间扩展。其中，1980、1985、1990、1995和2000年为逐月产品，使用SMMR，SSM/I和SSMIS 19 GHz V/H及37 GHz V三个通道的亮温数据。2002年6月20日至2018年12月30日为逐日产品，使用AMSR-E和AMSR2 6.925 GHz V/H，10.65 GHz V/H及36.5 GHz V五个通道的亮温数据。\n参与训练随机森林模型的辅助数据包括IGBP地表分类数据，GTOPO30 DEM数据以及经/纬度等信息。","doi":"10.11888/Soil.tpdc.270948","projection":"","language":"zh","share_type":"online","east":110.0,"west":70.0,"south":25.0,"north":45.0,"scale":null,"crs":null,"filesize":605.0,"share_policy":"a","ts_created":"2020-09-26T19:15:45.537502+08:00","doi_type":"拥有自主知识产权","ts_updated":"2021-09-24T14:42:46.936700+08:00","time_description":"1980, 1985,1990, 1995, 2000, 2002.06.20 – 2018.12.30","datas_group":3,"time_description_en":"","data_format":null,"project":[11,12],"specials":["4e7b97a6-ee1f-4b51-83e5-04a100993973","836a1603-47d0-494e-88c1-96723fd8e0bc","836a1603-47d0-494e-88c1-96723fd8e0bc","f2a78cde-1c98-4241-94dc-7532eba32b80","f2a78cde-1c98-4241-94dc-7532eba32b80"],"cite":null,"review_status":5,"review_invite":[{"user_name":"周彦昭","username":"小昭","email":"zhouyanzhao9@126.com","is_cancel_expert":false}],"review_editor":{"id":42421,"last_login":"2022-04-08T15:16:51.670544+08:00","username":"任慧霞","email":"510727846@qq.com","is_active":true,"is_staff":true,"user_name":"任慧霞"},"data_sources":null,"temporal_resolution":"Daily","spatial_resolution":"10km - 100km","license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[6],"subtopics":{"metadata":"71864e5d-fdfc-43aa-abfd-f13d12f633aa","three_pole":null,"third_pole":"XDA20100101"},"username":"XDA20100101","review_time":null,"protected_duration":null,"protected_describe":null,"is_important":false,"hit_count":4555}